chore: dependencies update

- chore: update `node-sass` to `4.9.4`
- chore: update `eslint` to `5.7.0`
- chore: update `babel-plugin-istanbul` to `5.1.0`
- chore: update `semver` to `5.6.0`
- chore: update `autoprefixer` to `9.2.0`

Author: xidedix

CHANGELOG.md

@@ -1,3 +1,10 @@
+## v2.0.19
+- chore: update `node-sass` to `4.9.4`
+- chore: update `eslint` to `5.7.0`
+- chore: update `babel-plugin-istanbul` to `5.1.0`
+- chore: update `semver` to `5.6.0`
+- chore: update `autoprefixer` to `9.2.0`
+
 ## v2.0.18
 - feat: add deep objects merge utility
 - chore: build rollup utilities script cleanup